Skelton will face Danny Williams again this summer

Skelton had to overcome a gutsy display from the French-based Armenian before finishing the non-title fight strongly.

Skelton will face Williams again at Manchester's MEN Arena on 15 July.

Meanwhile, Stephen Foster Jnr retained his WBU featherweight title with a unanimous points win over Glasgow's John Simpson.

Skelton, in action only five weeks after losing to Williams, took time to get into his stride but floored his opponent with a body-shot in the third round.

The Bedford fighter was determined to finish the job in the fourth and fired in two damaging punches which forced Kalachyan to take the full count after 30 seconds of the round.

After losing his unbeaten record last time he met Williams, Skelton is keen for better next time.

"I was back in the gym training a few days after the Williams fight and wanted to get back as soon as possible," he said. "I'm ready for the rematch and believe I can put the record straight by beating him next time."

But Williams, who was ringside at York Hall was unimpressed by Skelton's display against Kalachyan.

"He didn't show me anything I haven't seen from him before and I'm confident I can do a better job next time," he said.